linux-kernel - Re: [PATCH 6/7] xen/evtch: use smp barriers for user event ring

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Date:   Mon, 8 Feb 2021 10:41:45 +0100
From:   Jürgen Groß <jgross@...e.com>
To:     Jan Beulich <jbeulich@...e.com>
Cc:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Subject: Re: [PATCH 6/7] xen/evtch: use smp barriers for user event ring

On 08.02.21 10:38, Jan Beulich wrote:
> On 06.02.2021 11:49, Juergen Gross wrote:
>> The ring buffer for user events is used in the local system only, so
>> smp barriers are fine for ensuring consistency.
>>
>> Reported-by: Andrew Cooper <andrew.cooper3@...rix.com>
>> Signed-off-by: Juergen Gross <jgross@...e.com>
> 
> Reviewed-by: Jan Beulich <jbeulich@...e.com>
> 
> Albeit I think "local system" is at least ambiguous (physical
> machine? VM?). How about something like "is local to the given
> kernel instance"?

Yes.


Juergen


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